According to economists, the number of dissents would help to determine the FOMC's path forward.

Art Cashin, the director of floor operations for UBS Financial Services at the New York Stock Exchange, said the more dissents, the more likely the Fed will go incredibly slow with subsequent rate hikes.

"If the Fed moves as expected, a key will be if there are dissenting votes, and, if so, how many," he said. "While Yellen likes unanimity, several dissents could underscore the no rush to hike theme."

Economists such as Drew Matus at UBS, Lindsey Piegza at Stifel and Michael Hanson at Bank of America-Merrill Lynch also highlighted the possibility of dissents predicting the future path of hikes.

With a lack of dissents, that seems to signal that even some of the more skeptical members of the committee were on board for the hike.

"[The Fed] did little to take the sting out of that hike by lowering its projections for the pace of future rate hikes," said Paul Ashworth, chief US economist for Capital Economics, in a note after the release. "The vote to raise rates was also unanimous, which could also be interpreted as hawkish."

Markets and economists are concerned with the path forward for the Fed, and the pace of additionally rate hikes in 2016. Before Wednesday's announcement, the market had priced in around 2 rate hikes next year while the Fed's dot plot had previously signaled 4.

A number of dissents and a lowering of the dots would have signaled a slower pace of hiking, closer to the markets expectations. Based on the economists' logic, the lack of dissents — along with the dot plot being largely unchanged — seems to signal 4 hikes next year, more than is priced into the market.

Dissents are not unprecedented, in fact there hasn't been a year without a dissent since 2004 according to a study by the Federal Reserve Bank of St. Louis.

What would be notable is if a Governor dissented, as it would have more bearing on 2016 and beyond.

Thornton and Wheelock/Federal Reserve Bank of St. Louis

There are two types of members of the Federal Open Markets Committee, Presidents of Federal Reserve Bank Branches and Federal Reserve Governors. While 5 of the 12 Federal Reserve Branch Presidents rotate onto the Federal Open Markets Committee, the Governors are on the FOMC throughout their President-appointed, 14-year term.

"Assuming the FOMC hikes rates, we believe a dissent is likely, either by Chicago Fed President [Charles] Evans or Governor [Lael] Brainard," said UBS' Matus in a note on Tuesday.

Bank of America-Merrill Lynch's Hanson also cited Evans and Brainard as possible dissenters, but added Governor Daniel Tarullo might do so as well. Unlike Piegza, Cashin and Matus, however, cautioned in reading too much into it and pointed out that Evans is not a voting member again until 2017.

It seems that the Fed is signaling to the markets to get ready for more in 2016.